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Next: <a href="Fortran-2003-status.html#Fortran-2003-status" accesskey="n" rel="next">Fortran 2003 status</a>, Up: <a href="Standards.html#Standards" accesskey="u" rel="up">Standards</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Fortran-95-status-1"></a>
<h4 class="subsection">1.3.1 Fortran 95 status</h4>
<a name="index-Varying-length-strings"></a>
<a name="index-strings_002c-varying-length"></a>
<a name="index-conditional-compilation"></a>

<p>The Fortran 95 standard specifies in Part 2 (ISO/IEC 1539-2:2000)
varying length character strings.  While GNU Fortran currently does not
support such strings directly, there exist two Fortran implementations
for them, which work with GNU Fortran. One can be found at
<a href="http://user.astro.wisc.edu/~townsend/static.php?ref=iso-varying-string">http://user.astro.wisc.edu/~townsend/static.php?ref=iso-varying-string</a>.
</p>
<p>Deferred-length character strings of Fortran 2003 supports part of
the features of <code>ISO_VARYING_STRING</code> and should be considered as
replacement. (Namely, allocatable or pointers of the type
<code>character(len=:)</code>.)
</p>
<p>Part 3 of the Fortran 95 standard (ISO/IEC 1539-3:1998) defines
Conditional Compilation, which is not widely used and not directly
supported by the GNU Fortran compiler.  You can use the program coco
to preprocess such files (<a href="http://www.daniellnagle.com/coco.html">http://www.daniellnagle.com/coco.html</a>).
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